Multi-mode quantitative free space efficient optical fiber coupling system based on coupling end

Abstract

The invention relates to the technical field of optical fiber coupling, in particular to a coupling-end-based multi-mode quantitative free space efficient optical fiber coupling system, which comprises a placement table, a supporting mechanism, a lens mechanism and a diaphragm mechanism, and is characterized in that the placement table is provided with an optical fiber; a light taking mechanism is arranged on the placement table, an adjusting mechanism is arranged on the light taking mechanism, and a detection mechanism is arranged on the placement table; through the diaphragm mechanism, the distance between the diaphragm and the lens can be conveniently adjusted; through the lens mechanism, a lens assembly can be conveniently and rapidly installed and replaced; through the light taking mechanism and the adjusting mechanism, fine adjustment of the angle of the sampling mirror main body is facilitated, and when the reflecting mirror main body is affected, the reflection angle of the reflecting mirror main body can be adjusted; real-time quantitative monitoring feedback is carried out through quantitative position feedback of the intensity distribution sensor and the incident fiber coupling efficiency, and the coupling end is assisted in improving the effective utilization rate of optical energy incident fibers in a quantitative mode.

Description

technical field [0001] The invention relates to the technical field of optical fiber coupling, in particular to a coupling end-based multimodal quantitative free space efficient optical fiber coupling system. Background technique [0002] Optical fiber coupling device is a component used to realize free-space optical signal splitting / combining, or used to extend optical fiber links. It belongs to the field of optical passive components. applied on the road. Various free-space fiber coupling devices are mostly free-space fiber coupling adjustment technologies that rely on the rear reference and the front aperture aperture for rough reference, and use a power meter to adjust the power reference at the fiber output end. The traditional free-space fiber coupling device has poor system coupling efficiency and stability. [0003] However, in the actual operation of the traditional free-space fiber coupling device, most of the diaphragms used to adjust the light are fixedly place...

AI Technical Summary

Problems solved by technology

Traditional free-space fiber coupling devices have poor system coupling efficiency and stability

[0003] However, in the actual operation of the traditional free-space fiber coupling device, the diaphragm used to adjust the light is mostly fixed, so that when the lens changes, the proper distance between the diaphragm and the lens will also change, thus affecting The diaphragm can adjust the light; at the same time, some stray light and unnecessary light will be generated during the operation process, which will easily cause certain interference to the quantitative process; at the same time, when the traditional lens is fixed, most of them need some bolt parts to fix In addition, when in use, the sampling mirror and the reflector are mostly fixed and set in advance, but in the long-term operation process, the reflector is easy to reflect the angle of light due to various external influences. Some small deviations will result in a decrease in coupling efficiency, which will cause unnecessary error effects on the detection results for some applications, especially for traditional free-space fiber coupling devices with relatively small fiber cores, the coupling efficiency is even worse far away

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